Manganeso

Manganese
25Mn
- ↑ Mn ↓ Tc Periodic table chromium ← manganese → iron
Appearance
silvery metallic
General properties
Name, simbolo, kaiphan	manganese, Mn, 25
Pronunciation	Plantilya:IPAc-en Plantilya:Respell
Element category	puthaw nga transisyon
Group, period, block	7, 4, d
Standard atomic weight	54.938045(5)
Electron configuration	[Ar] 4s2 3d5 2, 8, 13, 2
History
Discovery	Torbern Olof Bergman (1770)
First isolation	Johann Gottlieb Gahn (1774)
Physical properties
Phase	magahi
Density (near r.t.)	7.21 g·cm−3
Liquid density at m.p.	5.95 g·cm−3
Melting point	1519 K, 1246 °C, 2275 °F
Boiling point	2334 K, 2061 °C, 3742 °F
Heat of fusion	12.91 kJ·mol−1
Heat of vaporization	221 kJ·mol−1
Molar heat capacity	26.32 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1228 1347 1493 1691 1955 2333
Atomic properties
Oxidation states	7, 6, 5, 4, 3, 2, 1, -1, -2, -3 (oxides: acidic, basic or amphoteric depending on the oxidation state)
Electronegativity	1.55 (Pauling scale)
Ionization energies (more)	1st: 717.3 kJ·mol−1
	2nd: 1509.0 kJ·mol−1
	3rd: 3248 kJ·mol−1
Atomic radius	127 pm
Covalent radius	139±5 (low spin), 161±8 (high spin) pm
Miscellanea
Crystal structure	body-centered cubic
Magnetic ordering	paramagnetic
Electrical resistivity	(20 °C) 1.44 µΩ·m
Thermal conductivity	7.81 W·m−1·K−1
Thermal expansion	(25 °C) 21.7 µm·m−1·K−1
Speed of sound (thin rod)	(20 °C) 5150 m·s−1
Young's modulus	198 GPa
Bulk modulus	120 GPa
Mohs hardness	6.0
Brinell hardness	196 MPa
CAS registry number	7439-96-5
Most stable isotopes
Main article: Isotopes of manganese
iso NA half-life DM DE (MeV) DP 52Mn syn 5.591 d ε - 52Cr β+ 0.575 52Cr γ 0.7, 0.9, 1.4 - 53Mn trace 3.74×106 y ε - 53Cr 54Mn syn 312.3 d ε 1.377 54Cr γ 0.834 - 55Mn 100% 55Mn is stable with 30 neutrons

Ang manganeso (Iningles manganese) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Mn ug kaiphan nga atomik 25. Ang manganeso mao ang puthaw nga transisyon.

Galeriya sa hulagway

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